const mdnAtrules = require('mdn-data/css/at-rules.json'); const mdnProperties = require('mdn-data/css/properties.json'); const mdnSyntaxes = require('mdn-data/css/syntaxes.json'); const patch = require('./patch.json'); const extendSyntax = /^\s*\|\s*/; function preprocessAtrules(dict) { const result = Object.create(null); for (const atruleName in dict) { const atrule = dict[atruleName]; let descriptors = null; if (atrule.descriptors) { descriptors = Object.create(null); for (const descriptor in atrule.descriptors) { descriptors[descriptor] = atrule.descriptors[descriptor].syntax; } } result[atruleName.substr(1)] = { prelude: atrule.syntax.trim().match(/^@\S+\s+([^;\{]*)/)[1].trim() || null, descriptors }; } return result; } function patchDictionary(dict, patchDict) { const result = {}; // copy all syntaxes for an original dict for (const key in dict) { result[key] = dict[key].syntax || dict[key]; } // apply a patch for (const key in patchDict) { if (key in dict) { if (patchDict[key].syntax) { result[key] = extendSyntax.test(patchDict[key].syntax) ? result[key] + ' ' + patchDict[key].syntax.trim() : patchDict[key].syntax; } else { delete result[key]; } } else { if (patchDict[key].syntax) { result[key] = patchDict[key].syntax.replace(extendSyntax, ''); } } } return result; } function unpackSyntaxes(dict) { const result = {}; for (const key in dict) { result[key] = dict[key].syntax; } return result; } function patchAtrules(dict, patchDict) { const result = {}; // copy all syntaxes for an original dict for (const key in dict) { const patchDescriptors = (patchDict[key] && patchDict[key].descriptors) || null; result[key] = { prelude: key in patchDict && 'prelude' in patchDict[key] ? patchDict[key].prelude : dict[key].prelude || null, descriptors: dict[key].descriptors ? patchDictionary(dict[key].descriptors, patchDescriptors || {}) : patchDescriptors && unpackSyntaxes(patchDescriptors) }; } // apply a patch for (const key in patchDict) { if (!hasOwnProperty.call(dict, key)) { result[key] = { prelude: patchDict[key].prelude || null, descriptors: patchDict[key].descriptors && unpackSyntaxes(patchDict[key].descriptors) }; } } return result; } module.exports = { types: patchDictionary(mdnSyntaxes, patch.syntaxes), atrules: patchAtrules(preprocessAtrules(mdnAtrules), patch.atrules), properties: patchDictionary(mdnProperties, patch.properties) };